chia sẻ cho b nào cần
=IF(OR(WEEKDAY(C4)=1,C4=$F$17,C4=$F$18,C4=$F$19),0.9E4INDEX($B$17:$D$18,MATCH(RIGHT(B4,2),$A$17:$A$18,0),MATCH(LEFT(B4,2),$B$16:$D$16,0)),E4*INDEX($B$17:$D$18,MATCH(RIGHT(B4,2),$A$17:$A$18,0),MATCH(LEFT(B4,2),$B$16:$D$16,0)))
